Abstract: An elongated frame member and a rectangular screen frame assembly including the frame member having a unique cross sectional shape of the frame member for the reception and retention of flexible fiberglass or other types of screening material without requiring a separate spline or locking strip component. The uniform frame member cross section includes a substantially box or rectangular shaped main portion and substantially U-shaped portion positioned adjacent said main portion, said U-shaped portion including spaced apart first and second side walls and a bottom wall therebetween. Each first side wall is preferably substantially common with or defined by one surface of said main portion.